PTC thermistors for overcurrent protection and as inrush current limiters Leaded disks, 260 V up to 1000 V Series/Type: B597**C0... / B594**C1... Date: February 2018 (c) EPCOS AG 2018. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without EPCOS' prior express consent is prohibited. EPCOS AG is a TDK Group Company. Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Dimensional drawing with coating, C14** and C7** Applications Inrush current limiter for smoothing and DC link capacitors To replace high-power fixed resistors for capacitor charging Overcurrent and short circuit protection Features Lead-free terminals Self-protecting in case of malfunction of short-circuit relay or internal short circuit of capacitor Inrush current limiters are not damaged when directly connected to Vmax even without additional current limitation Marking: Type, manufacturer's logo, reference temperature in C and date code YYWW UL approval to UL 1434 (file number E69802) for ICL application selected types; Vmax = 480 V and VR = 400 V for C755 UL approval to UL 1434 (file number E69802) for overcurrent protection Vmax = 420 V and VR = 380 V, except type C758, C1412 and C1451 VDE approval (licence number 40040539) for ICL applications and for overcurrent protection selected types (licence number 104843) IECQ certificate (file number 101-QA-13) for ICL applications and for overcurrent protection selected types (file number 101-QA-2) Qualification based on AEC-Q200, Rev. D for B59412C1130B070 and B59451C1130B070 RoHS-compatible Delivery mode Cardboard strips (standard) Cardboard tape reeled or in Ammo pack on request Please read Cautions and warnings and Important notes at the end of this document. Dimensional drawing without coating, B750 and B770 Dimensions in mm Type wmax hmax B750 12.5 16.5 B770 8.5 12.0 C1412 15.0 19.0 C1451 15.0 19.0 C750 13.0 18.0 C751 13.0 18.0 C752 13.0 18.0 C753 13.0 18.0 C754 13.0 18.0 C755 13.0 18.0 C758 13.0 18.0 C770 9.0 13.5 C771 9.0 13.5 C772 9.0 13.5 C773 9.0 13.5 C774 9.0 13.5 Page 2 of 23 lmin 35 25 35 35 35 35 25 25 25 35 35 25 25 25 25 25 thmax 5.0 7.0 7.5 7.5 5.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 d 0.6 0.6 0.8 0.8 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V General technical data for inrush current limiters Operating cycles at Vmax Switching cycles at Vmax Operating temperature range Operating temperature range (charging of capacitor) (failure mode) (V = 0) (V = Vmax) Nc Nf Top Top > 100.000 > 100 40/+125 20/+85 cycles cycles C C Electrical specifications and ordering codes for inrush current limiters Type C770 C771 C772 C750 C751 C752 C1451 C753 C754 C773 C774 C1412 C755 V AC V DC RR Tref Cth (typ.) C J/K % 260 260 260 280 280 280 440 440 440 440 440 480 560 70 120 150 25 50 80 56 120 150 500 1100 120 500 25 25 25 25 25 25 25 25 25 25 25 25 25 Vmax Vlink,max RR 370 370 370 400 400 400 620 620 620 620 620 680 800 Please read Cautions and warnings and Important notes at the end of this document. 120 120 120 120 120 120 130 120 120 120 115 130 115 0.4 0.6 0.6 1.0 1.4 1.4 2.1 1.4 1.4 0.6 0.6 2.1 1.4 th 70 80 80 100 120 120 100 120 120 80 80 100 120 Circuit diagram Approvals Ordering code 2 2 2 2 2 2 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 X X X X X X X X s Page 3 of 23 IECQ X X X X X X X B59770C0120A070 B59771C0120A070 B59772C0120A070 B59750C0120A070 B59751C0120A070 B59752C0120A070 B59451C1130B070 B59753C0120A070 B59754C0120A070 B59773C0120A070 B59774C0115A070 B59412C1130B070 B59755C0115A070 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Circuit diagrams Three phases circuit Single phase circuit DC circuit Please read Cautions and warnings and Important notes at the end of this document. Page 4 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Calculation of the number of required PTC elements Number of required PTC elements (connected in parallel) as function of capacitance and charging voltage of smoothing or DC link capacitor: K K factor K = 1 for DC source K = 0.96 for 3-phase bridge rectifier K = 0.76 for single phase bridge rectifier N Number of required PTC thermistors connected in parallel C Capacitance of smoothing or DC link capacitor in F V Charging voltage of capacitor in V Cth Heat capacity in J/K Tref Reference temperature of PTC in C TA,max Expected maximum ambient temperature in C In case of large N values the resulting resistance of the parallel PTC network might be too low for effective limitation of the charging current. In this case a combination of series and parallel connected PTC thermistors can be used. Please read Cautions and warnings and Important notes at the end of this document. Page 5 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V General technical data for overcurrent protection Switching cycles Operating temperature range Operating temperature range (V = 0) (V = Vmax) N Top Top 100 40/+125 0/+60 C C Electrical specifications and ordering codes for overcurrent protection Type IR IS ISmax (V = Vmax) mA mA A Ir (typ.) (V = Vmax) mA RR Rmin Approvals Ordering code IECQ Vmax = 440 V DC or V AC, VR = 400 V DC or V AC, Tref = 120 C (typ.), RR = 25 % B750 123 245 4.0 4 25 13 X X B59750B0120A070 B770 64 127 2.8 3.0 70 45 X X B59770B0120A070 C751 87 173 4.0 3.5 50 26 X X B59751C0120A070 C752 69 137 4.0 3.5 80 42 X X B59752C0120A070 C753 56 112 4.0 3.0 120 63 X X B59753C0120A070 C754 50 100 4.0 3.0 150 68 X X B59754C0120A070 C771 49 97 2.8 2.5 120 76 X X B59771C0120A070 C772 43 86 2.8 2.5 150 96 X X B59772C0120A070 Vmax = 440 V DC or V AC, VR = 400 V DC or V AC, Tref = 130 C (typ.), RR = 25 % C1412 75 150 7.0 6.0 120 63 B59412C1130B070 12.0 7.0 56 29 B59451C1130B070 C1451 100 200 Vmax = 550 V DC or V AC, VR = 500 V DC or V AC, Tref = 115 C (typ.), RR = 25 % C755 28 55 1.4 2.0 500 230 X X B59755C0115A070 C774 16 32 1.0 1.5 1100 700 X X B59774C0115A070 Vmax = 550 V DC or V AC, VR = 500 V DC or V AC, Tref = 120 C (typ.), RR = 25 % C773 24 48 1.0 2.0 500 320 X X B59773C0120A070 Vmax = 1000 V DC or V AC, VR = 1000 V DC or V AC, Tref = 110 C (typ.), RR = 33 % C758 8 17 0.5 3.0 7500 3380 B59758C0110A070 Circuit diagram Please read Cautions and warnings and Important notes at the end of this document. Page 6 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Reliability data for inrush current limiters and overcurrent protection Test Standard Electrical endurance, IEC 60738-1 constant Damp heat IEC 60738-1 Rapid change of temperature IEC 60738-1 Vibration IEC 60738-1 Shock IEC 60738-1 Climatic sequence IEC 60738-1 Please read Cautions and warnings and Important notes at the end of this document. R25/R25 Test conditions Electrical endurance, IEC 60738-1 Overcurrent cycling protection Room temperature, IS,max, Vmax Number of cycles: 100 Inrush current limiters Room temperature, Vlink,max applied energy < Cth (Tref TA) Number of cycles: 100 000 Storage at Vmax and Top,max (@ Vmax) Test duration: 1000 h Temperature of air: 40 C Relative humidity of air: 93% Duration: 56 days Test according to IEC 60068-2-78 T1 = Top,min (0 V), T2 = Top,max (0 V) Number of cycles: 5 Test duration: 30 min Test according to IEC 60068-2-14, test Na Frequency range: 10 to 55 Hz Displacement amplitude: 0.75 mm Test duration: 3 x 2 h Test according to IEC 60068-2-6, test Fc Acceleration : 500 m/s2 Pulse duration: 11 ms; 6 x 3 pulses Dry heat: T = Top,max (0 V) Test duration: 16 h Damp heat first cycle Cold: T = Top,min (0 V) Test duration: 2 h Damp heat 5 cycles Tests performed according to IEC 60068-2-30 Page 7 of 23 < 25% < 25% < 10% < 10% < 5% < 5% < 10% Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Characteristics (typical) PTC resistance RPTC versus PTC temperature TPTC (measured at low signal voltage) Residual current in high-ohmic state Ires as function of applied voltage VPTC, typical (measured at 25 C in still air) Please read Cautions and warnings and Important notes at the end of this document. Minimum resistance of PTC thermistors versus applied voltage (pulsed) Switching time tS versus switching current IS (measured at 25 C in still air) Page 8 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Characteristics (typical) PTC current IPTC versus PTC voltage VPTC (measured at 25 C in still air) Please read Cautions and warnings and Important notes at the end of this document. Rated current IR versus ambient temperature TA (measured in still air) Page 9 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Characteristics (typical) PTC resistance RPTC versus PTC temperature TPTC (measured at low signal voltage) Residual current in high-ohmic state Ires as function of applied voltage VPTC, typical (measured at 25 C in still air) Please read Cautions and warnings and Important notes at the end of this document. Minimum resistance of PTC thermistors versus applied voltage (pulsed) Switching time tS versus switching current IS (measured at 25 C in still air) Page 10 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Characteristics (typical) PTC current IPTC versus PTC voltage VPTC (measured at 25 C in still air) Please read Cautions and warnings and Important notes at the end of this document. Rated current IR versus ambient temperature TA (measured in still air) Page 11 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Characteristics (typical) PTC resistance RPTC versus PTC temperature TPTC (measured at low signal voltage) Residual current in high-ohmic state Ires as function of applied voltage VPTC, typical (measured at 25 C in still air) Please read Cautions and warnings and Important notes at the end of this document. Minimum resistance of PTC thermistors versus applied voltage (pulsed) Switching time tS versus switching current IS (measured at 25 C in still air) Page 12 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Characteristics (typical) PTC current IPTC versus PTC voltage VPTC (measured at 25 C in still air) Please read Cautions and warnings and Important notes at the end of this document. Rated current IR versus ambient temperature TA (measured in still air) Page 13 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Characteristics (typical) PTC resistance RPTC versus PTC temperature TPTC (measured at low signal voltage) Residual current in high-ohmic state Ires as function of applied voltage VPTC, typical (measured at 25 C in still air) Please read Cautions and warnings and Important notes at the end of this document. Minimum resistance of PTC thermistors versus applied voltage (pulsed) Switching time tS versus switching current IS (measured at 25 C in still air) Page 14 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Characteristics (typical) PTC current IPTC versus PTC voltage VPTC (measured at 25 C in still air) Please read Cautions and warnings and Important notes at the end of this document. Rated current IR versus ambient temperature TA (measured in still air) Page 15 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Characteristics (typical) PTC resistance RPTC versus PTC temperature TPTC (measured at low signal voltage) Residual current in high-ohmic state Ires as function of applied voltage VPTC, typical (measured at 25 C in still air) Please read Cautions and warnings and Important notes at the end of this document. Minimum resistance of PTC thermistors versus applied voltage (pulsed) Switching time tS versus switching current IS (measured at 25 C in still air) Page 16 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Characteristics (typical) PTC current IPTC versus PTC voltage VPTC (measured at 25 C in still air) Please read Cautions and warnings and Important notes at the end of this document. Rated current IR versus ambient temperature TA (measured in still air) Page 17 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Cautions and warnings General EPCOS thermistors are designed for specific applications and should not be used for purposes not identified in our specifications, application notes and data books unless otherwise agreed with EPCOS during the design-in-phase. Ensure suitability of thermistor through reliability testing during the design-in phase. The thermistors should be evaluated taking into consideration worst-case conditions. Storage Store thermistors only in original packaging. Do not open the package prior to processing. Storage conditions in original packaging: storage temperature 25 C ... +45 C, relative humidity 75% annual mean, maximum 95%, dew precipitation is inadmissible. Avoid contamination of thermistors surface during storage, handling and processing. Avoid storage of thermistor in harmful environment with effect on function on long-term operation (examples given under operation precautions). Use thermistor within the following period after delivery: Through-hole devices (housed and leaded PTCs): 24 months Motor protection sensors, glass-encapsulated sensors and probe assemblies: 24 months Telecom pair and quattro protectors (TPP, TQP): 24 months Leadless PTC thermistors for pressure contacting: 12 months Leadless PTC thermistors for soldering: 6 months SMDs in EIA sizes 3225 and 4032, and for PTCs with metal tags: 24 months SMDs in EIA sizes 1210 and smaller: 12 months Handling PTCs must not be dropped. Chip-offs must not be caused during handling of PTCs. The ceramic and metallization of the components must not be touched with bare hands. Gloves are recommended. Avoid contamination of thermistor surface during handling. Soldering (where applicable) Use rosin-type flux or non-activated flux. Insufficient preheating may cause ceramic cracks. Rapid cooling by dipping in solvent is not recommended. Complete removal of flux is recommended. Standard PTC heaters are not suitable for soldering. Please read Cautions and warnings and Important notes at the end of this document. Page 18 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Mounting Electrode must not be scratched before/during/after the mounting process. Contacts and housing used for assembly with thermistor have to be clean before mounting. Especially grease or oil must be removed. When PTC thermistors are encapsulated with sealing material, the precautions given in chapter "Mounting instructions", "Sealing and potting" must be observed. When the thermistor is mounted, there must not be any foreign body between the electrode of the thermistor and the clamping contact. The minimum force and pressure of the clamping contacts pressing against the PTC must be 10 N and 50 kPa, respectively. In case the assembly is exposed to mechanical shock and/ or vibration this force should be higher in order to avoid movement of the PTC during operation. During operation, the thermistor's surface temperature can be very high. Ensure that adjacent components are placed at a sufficient distance from the thermistor to allow for proper cooling at the thermistors. Ensure that adjacent materials are designed for operation at temperatures comparable to the surface temperature of thermistor. Be sure that surrounding parts and materials can withstand this temperature. Avoid contamination of thermistor surface during processing. Operation Use thermistors only within the specified temperature operating range. Use thermistors only within the specified voltage and current ranges. Environmental conditions must not harm the thermistors. Use thermistors only in normal atmospheric conditions. Avoid use in deoxidizing gases (chlorine gas, hydrogen sulfide gas, ammonia gas, sulfuric acid gas etc), corrosive agents, humid or salty conditions. Contact with any liquids and solvents should be prevented. Be sure to provide an appropriate fail-safe function to prevent secondary product damage caused by abnormal function (e.g. use VDR for limitation of overvoltage condition). This listing does not claim to be complete, but merely reflects the experience of EPCOS AG. Display of ordering codes for EPCOS products The ordering code for one and the same EPCOS product can be represented differently in data sheets, data books, other publications, on the EPCOS website, or in order-related documents such as shipping notes, order confirmations and product labels. The varying representations of the ordering codes are due to different processes employed and do not affect the specifications of the respective products. Detailed information can be found on the Internet under www.epcos.com/orderingcodes Please read Cautions and warnings and Important notes at the end of this document. Page 19 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V Symbols and terms Symbol A C Cth f I Imax IR Ires IPTC Ir Ir,oil Ir,air IRMS IS ISmax LCT N Nc Nf P P25 Pel Pdiss RG Rmin RR RR RP RPTC Rref RS R25 R25,match R25 Term Area Capacitance Heat capacity Frequency Current Maximum current Rated current Residual current PTC current Residual currrent Residual currrent in oil (for level sensors) Residual currrent in air (for level sensors) Root-mean-square value of current Switching current Maximum switching current Lower category temperature Number (integer) Operating cycles at Vmax, charging of capacitor Switching cycles at Vmax, failure mode Power Maximum power at 25 C Electrical power Dissipation power Generator internal resistance Minimum resistance Rated resistance @ rated temperature TR Tolerance of RR Parallel resistance PTC resistance Reference resistance Series resistance Resistance at 25 C Resistance matching per reel/ packing unit at 25 C Tolerance of R25 Please read Cautions and warnings and Important notes at the end of this document. Page 20 of 23 Overcurrent protection and inrush current limiting Leaded disks, 260 V up to 1000 V T t TA ta TC tE TR Tsense Top TPTC tR Tref TRmin tS Tsurf UCT V or Vel Vc(max) VF,max VRMS VBD Vins Vlink,max Vmax Vmax,dyn Vmeas Vmeas,max VR VPTC th th Temperature Time Ambient temperature Thermal threshold time Ferroelectric Curie temperature Settling time (for level sensors) Rated temperature @ 25 C or otherwise specified in the data sheet Sensing temperature Operating temperature PTC temperature Response time Reference temperature Temperature at minimum resistance Switching time Surface temperature Upper category temperature Voltage (with subscript only for distinction from volume) Maximum DC charge voltage of the surge generator Maximum voltage applied at fault conditions in protection mode Root-mean-square value of voltage Breakdown voltage Insulation test voltage Maximum link voltage Maximum operating voltage Maximum dynamic (short-time) operating voltage Measuring voltage Maximum measuring voltage Rated voltage Voltage drop across a PTC thermistor Temperature coefficient Tolerance, change Dissipation factor Thermal cooling time constant Failure rate Lead spacing (in mm) Please read Cautions and warnings and Important notes at the end of this document. Page 21 of 23 Important notes The following applies to all products named in this publication: 1. Some parts of this publication contain statements about the suitability of our products for certain areas of application. These statements are based on our knowledge of typical requirements that are often placed on our products in the areas of application concerned. We nevertheless expressly point out that such statements cannot be regarded as binding statements about the suitability of our products for a particular customer application. As a rule we are either unfamiliar with individual customer applications or less familiar with them than the customers themselves. For these reasons, it is always ultimately incumbent on the customer to check and decide whether a product with the properties described in the product specification is suitable for use in a particular customer application. 2. We also point out that in individual cases, a malfunction of electronic components or failure before the end of their usual service life cannot be completely ruled out in the current state of the art, even if they are operated as specified. In customer applications requiring a very high level of operational safety and especially in customer applications in which the malfunction or failure of an electronic component could endanger human life or health (e.g. in accident prevention or life-saving systems), it must therefore be ensured by means of suitable design of the customer application or other action taken by the customer (e.g. installation of protective circuitry or redundancy) that no injury or damage is sustained by third parties in the event of malfunction or failure of an electronic component. 3. The warnings, cautions and product-specific notes must be observed. 4. In order to satisfy certain technical requirements, some of the products described in this publication may contain substances subject to restrictions in certain jurisdictions (e.g. because they are classed as hazardous). Useful information on this will be found in our Material Data Sheets on the Internet (www.tdk-electronics.tdk.com/material). Should you have any more detailed questions, please contact our sales offices. 5. We constantly strive to improve our products. Consequently, the products described in this publication may change from time to time. The same is true of the corresponding product specifications. Please check therefore to what extent product descriptions and specifications contained in this publication are still applicable before or when you place an order. We also reserve the right to discontinue production and delivery of products. Consequently, we cannot guarantee that all products named in this publication will always be available. The aforementioned does not apply in the case of individual agreements deviating from the foregoing for customer-specific products. 6. Unless otherwise agreed in individual contracts, all orders are subject to our General Terms and Conditions of Supply. 7. Our manufacturing sites serving the automotive business apply the IATF 16949 standard. The IATF certifications confirm our compliance with requirements regarding the quality management system in the automotive industry. Referring to customer requirements and customer specific requirements ("CSR") TDK always has and will continue to have the policy of respecting individual agreements. Even if IATF 16949 may appear to support the acceptance of unilateral requirements, we hereby like to emphasize that only requirements mutually agreed upon can and will be implemented in our Quality Management System. For clarification purposes we like to point out that obligations from IATF 16949 shall only become legally binding if individually agreed upon. Page 22 of 23 Important notes 8. The trade names EPCOS, CeraCharge, CeraDiode, CeraLink, CeraPad, CeraPlas, CSMP, CTVS, DeltaCap, DigiSiMic, ExoCore, FilterCap, FormFit, LeaXield, MiniBlue, MiniCell, MKD, MKK, MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, PhiCap, PowerHap, PQSine, PQvar, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SiMic, SIMID, SineFormer, SIOV, ThermoFuse, WindCap are trademarks registered or pending in Europe and in other countries. Further information will be found on the Internet at www.tdk-electronics.tdk.com/trademarks. Release 2018-10 Page 23 of 23